Pengpeng Xue1 and Die Liu2,3This email address is being protected from spambots. You need JavaScript enabled to view it.
1Chengdu College of arts and science, chengdu, 610401, China
2Chongqing College of Humanities, Science & Technology, Chongqing 401520, China
3School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Received: December 11, 2024 Accepted: June 6, 2025 Publication Date: July 11, 2025
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
Megacities account for a significant portion of urban carbon emissions, and by analyzing the effectiveness of carbon emission, more effective steps could take to lower carbon emissions. China’s megacities’ carbon emission efficiency was evaluated between 2009 and 2019 and broken down using the Malmquis-Luenberger (ML) index. The factors and extent of influence on the megacities’ carbon emission efficiency were then examined and measured using the Tobit regression model. According to the findings, 1. Megacities’ overall carbon emission efficiency is low, averaging 0.6225 per year, and 2. There is clear polarization in the huge variations in megacities’ carbon emission efficiency. 2. Every megacity’s contribution to the evolution of carbon emission technology can be significantly more than the change in technology efficiency along with the annual average value of the megacities’ carbon emission ML index being 1.0654. 3. Megacities’ carbon emission efficiency is significantly impacted negatively by factors such as population density, openness to the outside world, and energy structure. Megacities’ carbon emission efficiency is positively impacted by both economic and environmental regulation, although to varying degrees. Environmental regulation has a major impact on carbon emission efficiency, while economic level has an average effect. As a result, every megacity should monitor changes in carbon emission technology, focus on increasing technological efficiency, and think about enhancing the megacity’s carbon emission efficiency from a variety of angles by fusing its unique city features.
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